:root {
    --bg: #f4f6f8; --card: #fff; --ink: #1f2733; --muted: #6b7785;
    --line: #e2e8f0; --accent: #2563eb; --accent-d: #1d4ed8;
    --ok-bg: #e7f7ed; --ok-ink: #137a3e; --err-bg: #fdeaea; --err-ink: #b42318;
}
* { box-sizing: border-box; }
body.auth {
    margin: 0; min-height: 100vh; background: var(--bg); color: var(--ink);
    font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    display: flex; align-items: center; justify-content: center; padding: 24px;
}
.auth-card {
    background: var(--card); border: 1px solid var(--line); border-radius: 14px;
    padding: 28px; width: 100%; max-width: 380px;
    box-shadow: 0 8px 30px rgba(0,0,0,.06);
}
.auth-card h1 { margin: 0; font-size: 24px; text-align: center; }
.auth-card h2 { font-size: 13px; color: var(--muted); text-transform: uppercase;
    letter-spacing: .04em; margin: 20px 0 8px; }
.auth-card .sub { text-align: center; color: var(--muted); margin: 4px 0 20px; }
.auth-card label { display: flex; flex-direction: column; font-size: 13px;
    color: var(--muted); gap: 4px; margin-bottom: 12px; }
.auth-card input {
    font: inherit; padding: 10px 12px; border: 1px solid var(--line);
    border-radius: 8px; background: #fff; color: var(--ink);
}
.auth-card input:focus { outline: none; border-color: var(--accent); }
.auth-card button {
    width: 100%; font: inherit; cursor: pointer; padding: 11px; margin-top: 8px;
    background: var(--accent); color: #fff; border: 0; border-radius: 8px;
}
.auth-card button:hover { background: var(--accent-d); }
.err { background: var(--err-bg); color: var(--err-ink); padding: 10px 12px;
    border-radius: 8px; margin-bottom: 12px; font-size: 14px; }
.ok { background: var(--ok-bg); color: var(--ok-ink); padding: 14px;
    border-radius: 8px; }
.ok a { color: var(--ok-ink); font-weight: 600; }
.warn { color: var(--err-ink); font-size: 13px; margin-top: 8px; }
code { background: #f1f5f9; padding: 1px 6px; border-radius: 4px; font-size: 13px; }